This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A140892 #19 Apr 11 2024 16:13:57
%S A140892 -1,0,0,0,399,357857,13055867207,558545862282195466,
%T A140892 5070602400912917604201018916608,
%U A140892 30432527221704537086371993251530170527181380482652674,99999999999999999999999999999999999999999999999999999999999999999999968818280070033816399
%N A140892 a(n) = (n-1)^F(n) - F(n)^(n-1), where F(n) = A000045(n).
%F A140892 a(n) = (n-1)^A000045(n) - A000045(n)^(n-1). - _Jonathan Vos Post_, Jul 12 2008
%e A140892 a(1) = (1-1)^F(1) - F(1)^(1-1) = 0^1 - 1^0 = 0 - 1 = -1;
%e A140892 a(4) = (4-1)^F(4) - F(4)^(4-1) = 3^3 - 3^3 = 27 - 27 = 0;
%e A140892 a(5) = (5-1)^F(5) - F(5)^(5-1) = 4^5 - 5^4 = 1024 - 625 = 399.
%t A140892 Table[(n-1)^Fibonacci[n] - Fibonacci[n]^(n-1), {n, 1, 12}] (* _Georg Fischer_, Apr 11 2023 *)
%Y A140892 Cf. A000045, A007965.
%K A140892 sign,less
%O A140892 1,5
%A A140892 _Juri-Stepan Gerasimov_, Jul 07 2008
%E A140892 More terms from _Jonathan Vos Post_, Jul 12 2008
%E A140892 a(1) and a(7) corrected by _Georg Fischer_, Apr 11 2024